Identify the error in the following sentence : 'Each of the students are responsible for their homework.'

1.I cannot be subservient ¾ him.

2.By next month, Shraboni ¾ in the bank for five years.

3.We didn't win the match, we were happy with our team's performance ¾.

4.¾ you mind closing the window, please? It's very cold outside.

5.The auditorium is not available for use this week, It ¾

6.The antonym of '$detrimental^{\prime} is$ ¾.

7.Which one is correct?

8.That's the man ¾ I spoke about the job.

9.Meditation ¾ anxiety and ¾ a state of calmness.

10.If you are '$empathetic^{\prime}, you$ ¾

11.An entomologist ¾.

12.The word with incorrect spelling is -